http://image.baidu.com/i?ct=503316480&z=5&tn=baiduimagedetail&word=%D6%DC%D2%D7&in=24360&cl=2&cm=1&sc=0&lm=-1&pn=1&rn=1&di=1324101681&ln=110
鱼头顺时针转
http://image.baidu.com/i?ct=503316480&z=0&tn=baiduimagedetail&word=%D6%DC%D2%D7%B0%CB%D8%D4&in=26858&cl=2&cm=1&sc=0&lm=-1&pn=1&rn=1&di=313178721&ln=1037
鱼头逆时针转